package com.itcast.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itcast.reggie.common.CustomException;
import com.itcast.reggie.dto.DishDto;
import com.itcast.reggie.entity.Dish;
import com.itcast.reggie.entity.DishFlavor;
import com.itcast.reggie.mapper.DishMapper;
import com.itcast.reggie.service.DishFlavorService;
import com.itcast.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author hehehe
 * @ClassName DishServiceImpl
 * @Description TODO
 * @date 2022/11/30/030 16:04
 * @Version 1.0
 */
@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品，同时保存对应的口味数据
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavors(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        Long dishId = dishDto.getId();//菜品id
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());
        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavors(String id) {
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);

        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, id);
        List<DishFlavor> list = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(list);

        return dishDto;
    }

    /**
     * 更新菜品信息，同时更新对应的口味信息
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavors(DishDto dishDto) {

        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 删除菜品
     *
     * @param ids
     */
    @Transactional
    @Override
    public void deleteWithFlavors(List<String> ids) {

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids != null, Dish::getId, ids);
        queryWrapper.eq(Dish::getStatus, 1);
        int count = this.count(queryWrapper);
        if (count > 0) {
            throw new CustomException("套餐正在售卖中，不能删除");
        }
        this.removeByIds(ids);
        //多次sql操作，舍弃
//        for (String dishId : ids) {
//            LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
//            queryWrapper.eq(DishFlavor::getDishId, dishId);
//            dishFlavorService.remove(queryWrapper);
//        }

        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(ids != null, DishFlavor::getDishId, ids);
        dishFlavorService.remove(lambdaQueryWrapper);

    }
}
